Answer:
1. No one
2. someone
3. Everything
4. any
Step-by-step explanation:
In general, we can say that the indefinite pronouns are the words "any", "some" and all its variations. However, an indefinite pronoun is one that refers to the third person in a speech, but makes this reference vaguely and does not specify, not directly pointing out an exact element. In this way, we can consider the expressions "no one" and "everything" as indefinite pronouns.